\begin{table}%t4
\caption{Distance-dependent 
parameters of the small-scale structures observed towards QSO~B1331$+$170 (WSRT) and QSO~J0003$-$2323 (VLA).  }
\label{tab_WSRT_clumps_distdep}
\small
%\centering
\par
\begin{tabular}{cccccc}\hline\hline
 Quasar&clump&$r$&$M_{\rm HI}$&$n_{\rm HI}$&$\left(\frac{P}{
k_{\rm B}}\right)_{\rm upper}$\\
\rule{0pt}{3ex}&&[pc]&[$M_{\odot}$]&[cm$^{-3}$]&[cm$^{-3}$ K]\\\hline
QSO~J0003$-$2323
&A&45&470&0.14&27 \\
&B&45&280&0.06&14 \\
&C&49&160&0.06&14 \\
&D&36&150&0.06&45 \\
&E&32&160&0.07&8 \\\hline
QSO~B1331$+$170
&A&0.8&0.05&2.5&900 \\
&B&0.6&0.07&5.0&1100 \\
&C&0.5&0.02&5.5&3800 \\
&D&0.6&0.06&5.0&2600 \\
&E&0.5&0.02&4.8&700 \\
&F&0.5&0.05&7.9&600 \\\hline
\end{tabular}
\end{table}